Where your LIHEAP number appears

Your LIHEAP registration number (also called a case number or application number) is printed on official mail from your state's LIHEAP program. Check any letter, notice, or approval document you received after you submitted your application. The number is usually near the top of the page, often labeled "Case Number," "Application Number," "Registration Number," or "Client ID."

If you received an approval letter, denial letter, or any follow-up communication from your state LIHEAP office, that document contains your number. Keep these letters in a folder — you will need the number if you call with questions, want to check on your case status, or need to reapply in a future year.

The format varies by state. Some states use a simple sequence of numbers; others combine letters and numbers. There is no single national format, so your number will look different from someone in another state.

Key Takeaways

  • Your LIHEAP registration number appears on any official letter or notice your state LIHEAP program sent you after you submitted your application.
  • The number may be labeled "Case Number," "Application Number," "Registration Number," or "Client ID" depending on your state.
  • If you cannot find a letter, contact your state LIHEAP office directly and provide your name, address, and date of birth to retrieve your number.
  • Keep your registration number handy when you call about your case, check your status, or reapply in future years.

Contacting your state LIHEAP office to retrieve your number

If you have lost your paperwork or never received a letter, call your state LIHEAP program directly. Have your full name, current address, and date of birth ready. The staff member can look up your case in their system and give you your registration number over the phone.

Your state LIHEAP office is usually part of the Department of Social Services, Department of Human Services, or Department of Energy Assistance. The phone number is on your state's LIHEAP website. If you are unsure which state office to contact, call 211 and ask for the LIHEAP program in your state — they will give you the correct phone number and hours.

Call during business hours, which are typically Monday through Friday, 8 a.m. to 5 p.m. in your state's time zone. Wait times can be long during the heating or cooling season, so call early in the day if you can.

What to do if you never received a letter

If you submitted a LIHEAP application but never received any response — approval, denial, or acknowledgment — contact your state office before assuming your case does not exist. Mail can be delayed or sent to an old address if your application had an incorrect mailing address on it.

When you call, explain that you submitted an application on a specific date (if you remember it) and never heard back. The staff can check whether your application was received and processed. If it was processed, they will give you your registration number and tell you the status. If it was not received, they may ask you to resubmit.

Using your registration number

Once you have your number, write it down and keep it somewhere safe — a notes app on your phone, a folder with important documents, or a notebook. You will use this number every time you contact your state LIHEAP office about your case.

When you call or visit in person, provide your registration number first. It speeds up the process because the staff member can pull up your file immediately instead of searching by name. If you are reapplying in a future year, some states let you reference your old case number to avoid re-entering information they already have.

If your state uses an online portal

Some states have online portals where you can check your LIHEAP case status. If your state offers this, you typically log in with your registration number and a password you created when you first applied. Your registration number will be displayed in your account dashboard.

Check your state LIHEAP website to see if an online portal is available. If it is, you can look up your number there without calling. The portal usually also shows whether your application is pending, approved, or denied, and how much assistance you received.

Frequently Asked Questions

What if I lost my approval letter and do not remember my registration number?

Call your state LIHEAP office with your name, address, and date of birth. They can search their system and provide your registration number. You do not need the number to call — the staff can find your case using your personal information.

Is my LIHEAP registration number the same as my case number?

Yes, in most states these terms are used interchangeably. Some states call it a registration number, others call it a case number or application number, but they all refer to the same identifier. Check your letter to see what your state calls it.

Can I use my registration number to check my status online?

Some states have online portals where you can log in with your registration number and check your case status. Not all states offer this. Visit your state LIHEAP website to see if an online portal is available in your state.

What if I moved and my letter was sent to an old address?

Contact your state LIHEAP office and provide your current address. They can resend your approval letter or confirm your registration number over the phone. If your application was processed but the letter never reached you, they can still tell you the outcome and your case number.

Do I need my registration number to reapply next year?

You do not need it to reapply, but having it is helpful. Some states let you reference your old case number on a new application to link your records. It can speed up processing. If you have it, include it; if not, you can still apply without it.